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(No Model.)

E. H. CROSBY.

GALVANIG BATTERY.

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,UNITED STATES ,PATENT OFFICE."

EDWARD H. CROSBY, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO CROSBY ELECTRICCOMPANY, OF NEV YORK, N. Y.

BATTERY.

SPECIFICATION forming part of Letters Patent No. 437,393, datedSeptember 30, 1890.

Application led February 8, 1890. Serial No. 339,628. (No model.)

To @ZZ whom it may con/cern.: f Be it known that I, EDWARD H. CROSBY, ofBoston, in the county of Suifolk, State of Massachusetts, have inventedcertain new and useful Improvements in Galvani@ Batteries, of which thefollowing is a description sufficiently full, clear, and exact to enableany person skilled in the art or science to which said inventionappertains to make and use the same, reference being had to theaccompanying drawing, forming part of this specification, in which- Thefigure of the drawing is a vertical transverse section of my improvedbattery.

My invention relates especially to that class of open-circuit batteriesknown as dry batteriesg and it consists in certain novel featureshereinafter fully set forth and claimed,

' the obj ect being to produce a simpler, cheaper,

and more effective device of this character than is now in ordinary use.

The nature and-operation of the improvement will be readily understoodby all conversant with such matters from the following explanation.

In the drawing, A represents the containing-jar, which is constructed ofpasteboard, wood fiber, paper-stock, or similar cheap material, and isprovided with a tight-fitting cover b. The material of the jar -iscovered on its outer face with a coating of shellac d, and on its innerface is coated with a preparationf, compounded of parafline andozocerite or other suitable acid-proof substance. A zinc cylinder D isdisposed within the containing-j ar, and is preferably formed to fittightly therein.

On the bottom of the jar A and within the cylinder D a pad C, of felt orsimilar Vabsorbent material, is disposed. A stick of carbon K restscentrally upon the pad C. The space between the carbon and walls of thezinc cyl- Vinder is packed tightly with sawdust m,

mixedwith a dry excitant, preferably salammoniac. The pad C is saturatedwith a mild solution of sulphuric acid or other excitant. Connectors p oare respectively secured to the zinc and carbon and project throughsuitable openings in the cover b.

Instead of the zinc cylinder described a strip 5o or pencil of zinc maybe employed. As thus constructed the battery can be very cheaplymanufactured and readily transported Without injury, thecontaining-jarformingapacking-case therefor.

I do not confine myself to employing sawdust as a packing between thezinc and carbon, as any cheap material which can readily be mixed with adry excitant will effect similar results. Y v

The pad C, disposed in the bottom of the jar and cover by the sawdust orsimilar material, as described, retains its moisture for a long time,and it is found that thisl arrangement of the parts greatly increasesthe electro-motive force of the battery. The life of the battery is muchlonger than those of ordinary construction, and by slightlymoisteningthe pad it can readily be renewed.

YHaving thus explained my invention, what 7o I claim is l. Acontaining-jar for electric batteries, constructedof paper-stock orsimilar material prepared with an outer coating of shellac and an inneracid-proof coating compounded 7 5 of paraffine and ozocerite,substantially as described.

2. In an electric battery, an acid-proof containing-jar, an absorbentpad disposed therein, a zinc plate, and a carbon plate resting on 8osaid pad and surrounded by a packing containing a dry excitant,substantially as de-.V scribed.

3. In an electric battery, the combination of an acid-proofcontaining-jar, a zinc plate, an absorbent pad saturated with anexcitant, and a carbon plate in contact with said pad and surrounded bya packing containing a dry excitant, substantially as described.

4. In an electric battery, a packing sepa- 9o rating the positive andnegative plates and comprising sawdust or Wood fiber mixed with anexcitant in a dry or crystalline form, substantially as described.

5. In an electric battery, the combination rounding said carbon,substantially as set of a paper containing-jar coated with an forth.

acid-proof composition, a zinc plate, a pad of absorbent materialdisposed Within said jar EDWARD H CROSBY and containing a liquidexcitant, a carbon Witnesses: i

plate on said pad, and a packing comprising O. M. SHAW,

sawdust anda dry or crystalline excitant sur- K. DURFEE.

